Package org.jitsi.impl.neomedia.rtp

Class FrameMarkingHeaderExtension

java.lang.Object

org.jitsi.impl.neomedia.rtp.FrameMarkingHeaderExtension

public class FrameMarkingHeaderExtension
extends Object

Provides utility functions for the frame marking RTP header extension described in https://tools.ietf.org/html/draft-ietf-avtext-framemarking-03 Non-Scalable

  0                   1
  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |  ID=? |  L=0  |S|E|I|D|0 0 0 0|
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 

Scalable

  0                   1                   2                   3
  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |  ID=? |  L=2  |S|E|I|D|B| TID |   LID         |    TL0PICIDX  |
  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 

Author:

Boris Grozev, Sergio Garcia Murillo

Constructor Summary

Constructors

Constructor	Description
FrameMarkingHeaderExtension()

Method Summary

Modifier and Type	Method	Description
static byte	getSpatialID(org.jitsi.utils.ByteArrayBuffer baf, String encoding)
static byte	getTemporalID(org.jitsi.utils.ByteArrayBuffer baf)
static boolean	isEndOfFrame(org.jitsi.utils.ByteArrayBuffer baf)
static boolean	isKeyframe(org.jitsi.utils.ByteArrayBuffer baf)
static boolean	isStartOfFrame(org.jitsi.utils.ByteArrayBuffer baf)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FrameMarkingHeaderExtension

public FrameMarkingHeaderExtension()

Method Detail

isKeyframe

public static boolean isKeyframe(org.jitsi.utils.ByteArrayBuffer baf)

Returns:

true if the extension contained in the given buffer indicates that the corresponding RTP packet is the first packet of a keyframe (i.e. the S and I bits are set).

isStartOfFrame

public static boolean isStartOfFrame(org.jitsi.utils.ByteArrayBuffer baf)

Returns:

true if the extension contained in the given buffer indicates that the corresponding RTP packet is the first packet of a frame (i.e. the S bit is set).

isEndOfFrame

public static boolean isEndOfFrame(org.jitsi.utils.ByteArrayBuffer baf)

Returns:

true if the extension contained in the given buffer indicates that the corresponding RTP packet is the last packet of a frame (i.e. the E bit is set).

getSpatialID

public static byte getSpatialID(org.jitsi.utils.ByteArrayBuffer baf,
                                String encoding)

Parameters:

baf - Header extension byte array

encoding - Encoding type used to parse the LID field

Returns:

the spatial layerd id present in the LID or 0 if not present.

getTemporalID

public static byte getTemporalID(org.jitsi.utils.ByteArrayBuffer baf)

Parameters:

baf - Header extension byte array

Returns:

The temporal layer id (the LID bits) or 0 if not present